[ODE] Character control

[Patrik Stellmann]

The most 'correct' way is probably to create a 2d-joint allowing only 
moving along the horizontal axis' and rotation along the vertical axis 
which might be a useful
extension to ode also for others. However, I have no experience with 
writing joints in ode yet so I have no idea how much work it is.

An alternative would be to place the center of mass at the ground - 
since center of mass needs to be at (0, 0, 0) so far you could realize 
that by shifting the box-geom with transform-geom. Maybe you can also 
get the required results with specifying a very high inertia moment for 
the two horizontal axis or a combination of both...

just my 2 cents...